| HDFS-13806 | EC: No error message for unsetting EC policy of the directory inherits the erasure coding policy from an ancestor directory | Minor | erasure-coding | Souryakanta Dwivedy | Ayush Saxena | 
| HDFS-12459 | Fix revert: Add new op GETFILEBLOCKLOCATIONS to WebHDFS REST API | Major | webhdfs | Weiwei Yang | Weiwei Yang | 
| HADOOP-15418 | Hadoop KMSAuthenticationFilter needs to use getPropsByPrefix instead of iterator to avoid ConcurrentModificationException | Major | common | Suma Shivaprasad | Suma Shivaprasad | 
| HDFS-14004 | TestLeaseRecovery2#testCloseWhileRecoverLease fails intermittently in trunk | Major | . | Ayush Saxena | Ayush Saxena | 
| HDFS-13959 | TestUpgradeDomainBlockPlacementPolicy is flaky | Major | . | Ayush Saxena | Ayush Saxena | 
| YARN-8948 | PlacementRule interface should be for all YarnSchedulers | Major | . | Bibin Chundatt | Bibin Chundatt | 
| HADOOP-16013 | DecayRpcScheduler decay thread should run as a daemon | Major | ipc | Erik Krogen | Erik Krogen | 
| HDFS-14175 | EC: Native XOR decoder should reset the output buffer before using it. | Major | ec, hdfs | Surendra Singh Lilhore | Ayush Saxena | 
| HDFS-14202 | “dfs.disk.balancer.max.disk.throughputInMBperSec” property is not working as per set value. | Major | diskbalancer | Ranith Sardar | Ranith Sardar | 
| HADOOP-16032 | Distcp It should clear sub directory ACL before applying new ACL on it. | Major | tools/distcp | Ranith Sardar | Ranith Sardar | 
| HADOOP-16127 | In ipc.Client, put a new connection could happen after stop | Major | ipc | Tsz-wo Sze | Tsz-wo Sze | 
| YARN-4901 | QueueMetrics needs to be cleared before MockRM is initialized | Major | scheduler | Daniel Templeton | Peter Bacsko | 
| HADOOP-16161 | NetworkTopology#getWeightUsingNetworkLocation return unexpected result | Major | net | Xiaoqiao He | Xiaoqiao He | 
| HDFS-14434 | webhdfs that connect secure hdfs should not use user.name parameter | Minor | webhdfs | KWON BYUNGCHANG | KWON BYUNGCHANG | 
| HDFS-14527 | Stop all DataNodes may result in NN terminate | Major | namenode | Xiaoqiao He | Xiaoqiao He | 
| HDFS-14494 | Move Server logging of StatedId inside receiveRequestState() | Major | . | Konstantin Shvachko | Shweta | 
| HDFS-14618 | Incorrect synchronization of ArrayList field (ArrayList is thread-unsafe). | Critical | . | Paul Ward | Paul Ward | 
| HDFS-14610 | HashMap is not thread safe. Field storageMap is typically synchronized by storageMap. However, in one place, field storageMap is not protected with synchronized. | Critical | . | Paul Ward | Paul Ward | 
| HDFS-14499 | Misleading REM_QUOTA value with snapshot and trash feature enabled for a directory | Major | snapshots | Shashikant Banerjee | Shashikant Banerjee | 
| HDFS-14647 | NPE during secure namenode startup | Major | hdfs | Fengnan Li | Fengnan Li | 
| HADOOP-16461 | Regression: FileSystem cache lock parses XML within the lock | Major | fs | Gopal Vijayaraghavan | Gopal Vijayaraghavan | 
| HDFS-14660 | [SBN Read] ObserverNameNode should throw StandbyException for requests not from ObserverProxyProvider | Major | . | Chao Sun | Chao Sun | 
| HDFS-14569 | Result of crypto -listZones is not formatted properly | Major | . | Hemanth Boyina | Hemanth Boyina | 
| HADOOP-12282 | Connection thread’s name should be updated after address changing is detected | Major | ipc | zhouyingchao | Lisheng Sun | 
| HDFS-14686 | HttpFS: HttpFSFileSystem#getErasureCodingPolicy always returns null | Major | httpfs | Siyao Meng | Siyao Meng | 
| HADOOP-15865 | ConcurrentModificationException in Configuration.overlay() method | Major | . | Oleksandr Shevchenko | Oleksandr Shevchenko | 
| HDFS-14759 | HDFS cat logs an info message | Major | . | Eric Badger | Eric Badger | 
| HDFS-2470 | NN should automatically set permissions on dfs.namenode.*.dir | Major | namenode | Aaron Myers | Siddharth Wagle | 
| YARN-9718 | Yarn REST API, services endpoint remote command ejection | Major | . | Eric Yang | Eric Yang | 
| YARN-9813 | RM does not start on JDK11 when UIv2 is enabled | Critical | resourcemanager, yarn | Adam Antal | Adam Antal | 
| YARN-9820 | RM logs InvalidStateTransitionException when app is submitted | Critical | . | Rohith Sharma K S | Prabhu Joseph | 
| HDFS-14838 | RBF: Display RPC (instead of HTTP) Port Number in RBF web UI | Minor | rbf, ui | Xieming Li | Xieming Li | 
| HDFS-14699 | Erasure Coding: Storage not considered in live replica when replication streams hard limit reached to threshold | Critical | ec | Zhao Yi Ming | Zhao Yi Ming | 
| YARN-9833 | Race condition when DirectoryCollection.checkDirs() runs during container launch | Major | . | Peter Bacsko | Peter Bacsko | 
| YARN-9837 | YARN Service fails to fetch status for Stopped apps with bigger spec files | Major | yarn-native-services | Tarun Parimi | Tarun Parimi | 
| YARN-2255 | YARN Audit logging not added to log4j.properties | Major | . | Varun Saxena | Aihua Xu | 
| HDFS-14836 | FileIoProvider should not increase FileIoErrors metric in datanode volume metric | Minor | . | Aiphago | Aiphago | 
| HADOOP-16581 | ValueQueue does not trigger an async refill when number of values falls below watermark | Major | common, kms | Yuval Degani | Yuval Degani | 
| HDFS-14853 | NPE in DFSNetworkTopology#chooseRandomWithStorageType() when the excludedNode is not present | Major | . | Ranith Sardar | Ranith Sardar | 
| HDFS-13660 | DistCp job fails when new data is appended in the file while the distCp copy job is running | Critical | distcp | Mukund Thakur | Mukund Thakur | 
| HDFS-14808 | EC: Improper size values for corrupt ec block in LOG | Major | ec | Harshakiran Reddy | Ayush Saxena | 
| HDFS-14849 | Erasure Coding: the internal block is replicated many times when datanode is decommissioning | Major | ec, erasure-coding | HuangTao | HuangTao | 
| YARN-9858 | Optimize RMContext getExclusiveEnforcedPartitions | Major | . | Jonathan Hung | Jonathan Hung | 
| HDFS-14492 | Snapshot memory leak | Major | snapshots | Wei-Chiu Chuang | Wei-Chiu Chuang | 
| HDFS-14418 | Remove redundant super user priveledge checks from namenode. | Major | . | Ayush Saxena | Ayush Saxena | 
| HDFS-14216 | NullPointerException happens in NamenodeWebHdfs | Critical | . | lujie | lujie | 
| HDFS-14637 | Namenode may not replicate blocks to meet the policy after enabling upgradeDomain | Major | namenode | Stephen O’Donnell | Stephen O’Donnell | 
| HDFS-14879 | Header was wrong in Snapshot web UI | Major | . | Hemanth Boyina | Hemanth Boyina | 
| HDFS-14655 | [SBN Read] Namenode crashes if one of The JN is down | Critical | . | Harshakiran Reddy | Ayush Saxena | 
| HDFS-14859 | Prevent unnecessary evaluation of costly operation getNumLiveDataNodes when dfs.namenode.safemode.min.datanodes is not zero | Major | hdfs | Srinivasu Majeti | Srinivasu Majeti | 
| YARN-6715 | Fix documentation about NodeHealthScriptRunner | Major | documentation, nodemanager | Peter Bacsko | Peter Bacsko | 
| YARN-9552 | FairScheduler: NODE_UPDATE can cause NoSuchElementException | Major | fairscheduler | Peter Bacsko | Peter Bacsko | 
| HDFS-14754 | Erasure Coding :  The number of Under-Replicated Blocks never reduced | Critical | ec | Hemanth Boyina | Hemanth Boyina | 
| HDFS-14245 | Class cast error in GetGroups with ObserverReadProxyProvider | Major | . | Shen Yinjie | Erik Krogen | 
| HDFS-14373 | EC : Decoding is failing when block group last incomplete cell fall in to AlignedStripe | Critical | ec, hdfs-client | Surendra Singh Lilhore | Surendra Singh Lilhore | 
| HDFS-14509 | DN throws InvalidToken due to inequality of password when upgrade NN 2.x to 3.x | Blocker | . | Yuxuan Wang | Yuxuan Wang | 
| HDFS-14886 | In NameNode Web UI’s Startup Progress page, Loading edits always shows 0 sec | Major | . | Hemanth Boyina | Hemanth Boyina | 
| YARN-8453 | Additional Unit  tests to verify queue limit and max-limit with multiple resource types | Major | capacity scheduler | Sunil G | Adam Antal | 
| HDFS-14890 | Setting permissions on name directory fails on non posix compliant filesystems | Blocker | . | hirik | Siddharth Wagle | 
| HADOOP-16580 | Disable retry of FailoverOnNetworkExceptionRetry in case of AccessControlException | Major | common | Adam Antal | Adam Antal | 
| HDFS-14909 | DFSNetworkTopology#chooseRandomWithStorageType() should not decrease storage count for excluded node which is already part of excluded scope | Major | namenode | Surendra Singh Lilhore | Surendra Singh Lilhore | 
| HADOOP-16600 | StagingTestBase uses methods not available in Mockito 1.8.5 in branch-3.1 | Major | . | Lisheng Sun | Duo Zhang | 
| MAPREDUCE-6441 | Improve temporary directory name generation in LocalDistributedCacheManager for concurrent processes | Major | . | William Watson | Haibo Chen | 
| HADOOP-16662 | Remove unnecessary InnerNode check in NetworkTopology#add() | Minor | . | Lisheng Sun | Lisheng Sun | 
| HDFS-14847 | Erasure Coding: Blocks are over-replicated while EC decommissioning | Critical | ec | Fei Hui | Fei Hui | 
| HDFS-14913 | Correct the value of available count in DFSNetworkTopology#chooseRandomWithStorageType() | Major | . | Ayush Saxena | Ayush Saxena | 
| YARN-9915 | Fix FindBug issue in QueueMetrics | Minor | . | Prabhu Joseph | Prabhu Joseph | 
| HDFS-12749 | DN may not send block report to NN after NN restart | Major | datanode | TanYuxin | Xiaoqiao He | 
| HDFS-13901 | INode access time is ignored because of race between open and rename | Major | . | Jinglun | Jinglun | 
| YARN-9921 | Issue in PlacementConstraint when YARN Service AM retries allocation on component failure. | Major | . | Tarun Parimi | Tarun Parimi | 
| HDFS-14910 | Rename Snapshot with Pre Descendants Fail With IllegalArgumentException. | Blocker | . | Íñigo Goiri | Wei-Chiu Chuang | 
| HDFS-14308 | DFSStripedInputStream curStripeBuf is not freed by unbuffer() | Major | ec | Joe McDonnell | Zhao Yi Ming | 
| HDFS-14931 | hdfs crypto commands limit column width | Major | . | Eric Badger | Eric Badger | 
| HADOOP-16669 | TestRawLocalFileSystemContract.testPermission fails if no native library | Minor | common, test | Steve Loughran | Steve Loughran | 
| HDFS-14920 | Erasure Coding: Decommission may hang If one or more datanodes are out of service during decommission | Major | ec | Fei Hui | Fei Hui | 
| HDFS-13736 | BlockPlacementPolicyDefault can not choose favored nodes when ‘dfs.namenode.block-placement-policy.default.prefer-local-node’ set to false | Major | . | hu xiaodong | hu xiaodong | 
| HDFS-14925 | rename operation should check nest snapshot | Major | namenode | Junwang Zhao | Junwang Zhao | 
| YARN-9949 | Add missing queue configs for root queue in RMWebService#CapacitySchedulerInfo | Minor | capacity scheduler | Prabhu Joseph | Prabhu Joseph | 
| HDFS-14945 | Revise PacketResponder’s log. | Minor | datanode | Xudong Cao | Xudong Cao | 
| HDFS-14946 | Erasure Coding: Block recovery failed during decommissioning | Major | . | Fei Hui | Fei Hui | 
| HDFS-14384 | When lastLocatedBlock token expire, it will take 1~3s second to refetch it. | Major | hdfs-client | Surendra Singh Lilhore | Surendra Singh Lilhore | 
| HDFS-14806 | Bootstrap standby may fail if used in-progress tailing | Major | namenode | Chen Liang | Chen Liang | 
| HDFS-14958 | TestBalancerWithNodeGroup is not using NetworkTopologyWithNodeGroup | Minor | hdfs | Jim Brennan | Jim Brennan | 
| HDFS-14720 | DataNode shouldn’t report block as bad block if the block length is Long.MAX_VALUE. | Major | datanode | Surendra Singh Lilhore | Hemanth Boyina | 
| HADOOP-16677 | Recalculate the remaining timeout millis correctly while throwing an InterupptedException in SocketIOWithTimeout. | Minor | common | Xudong Cao | Xudong Cao | 
| HDFS-14884 | Add sanity check that zone key equals feinfo key while setting Xattrs | Major | encryption, hdfs | Mukul Kumar Singh | Mukul Kumar Singh | 
| HADOOP-15097 | AbstractContractDeleteTest::testDeleteNonEmptyDirRecursive with misleading path | Minor | fs, test | zhoutai.zt | Xieming Li | 
| YARN-9984 | FSPreemptionThread can cause NullPointerException while app is unregistered with containers running on a node | Major | fairscheduler | Wilfred Spiegelenburg | Wilfred Spiegelenburg | 
| YARN-9983 | Typo in YARN Service overview documentation | Trivial | documentation | Denes Gerencser | Denes Gerencser | 
| HADOOP-16719 | Remove the disallowed element config within maven-checkstyle-plugin | Major | . | Wanqiang Ji | Wanqiang Ji | 
| HADOOP-16700 | RpcQueueTime may be negative when the response has to be sent later | Minor | . | xuzq | xuzq | 
| HADOOP-15686 | Supress bogus AbstractWadlGeneratorGrammarGenerator in KMS stderr | Major | kms | Wei-Chiu Chuang | Wei-Chiu Chuang | 
| HDFS-14940 | HDFS Balancer : Do not allow to set balancer maximum network bandwidth more than 1TB | Minor | balancer & mover | Souryakanta Dwivedy | Hemanth Boyina | 
| YARN-9838 | Fix resource inconsistency for queues when moving app with reserved container to another queue | Critical | capacity scheduler | jiulongzhu | jiulongzhu | 
| YARN-9968 | Public Localizer is exiting in NodeManager due to NullPointerException | Major | nodemanager | Tarun Parimi | Tarun Parimi | 
| YARN-9011 | Race condition during decommissioning | Major | nodemanager | Peter Bacsko | Peter Bacsko | 
| HDFS-14973 | Balancer getBlocks RPC dispersal does not function properly | Major | balancer & mover | Erik Krogen | Erik Krogen | 
| MAPREDUCE-7240 | Exception ’ Invalid event: TA_TOO_MANY_FETCH_FAILURE at SUCCESS_FINISHING_CONTAINER’ cause job error | Critical | . | luhuachao | luhuachao | 
| HDFS-14986 | ReplicaCachingGetSpaceUsed throws  ConcurrentModificationException | Major | datanode, performance | Ryan Wu | Aiphago | 
| MAPREDUCE-7249 | Invalid event TA_TOO_MANY_FETCH_FAILURE at SUCCESS_CONTAINER_CLEANUP causes job failure | Critical | applicationmaster, mrv2 | Wilfred Spiegelenburg | Wilfred Spiegelenburg | 
| HDFS-15010 | BlockPoolSlice#addReplicaThreadPool static pool should be initialized by static method | Major | datanode | Surendra Singh Lilhore | Surendra Singh Lilhore | 
| HADOOP-16744 | Fix building instruction to enable zstd | Minor | documentation | Masatake Iwasaki | Masatake Iwasaki | 
| HDFS-14869 | Data loss in case of distcp using snapshot diff. Replication should include rename records if file was skipped in the previous iteration | Major | distcp | Aasha Medhi | Aasha Medhi | 
| HADOOP-16754 | Fix docker failed to build yetus/hadoop | Blocker | build | Kevin Su | Kevin Su | 
| HDFS-15032 | Balancer crashes when it fails to contact an unavailable NN via ObserverReadProxyProvider | Major | balancer & mover | Erik Krogen | Erik Krogen | 
| HDFS-15036 | Active NameNode should not silently fail the image transfer | Major | namenode | Konstantin Shvachko | Chen Liang | 
| HDFS-14519 | NameQuota is not update after concat operation, so namequota is wrong | Major | . | Ranith Sardar | Ranith Sardar | 
| YARN-10055 | bower install fails | Blocker | build, yarn-ui-v2 | Akira Ajisaka | Akira Ajisaka | 
| HDFS-15076 | Fix tests that hold FSDirectory lock, without holding FSNamesystem lock. | Major | test | Konstantin Shvachko | Konstantin Shvachko | 
| HDFS-15073 | Replace curator-shaded guava import with the standard one | Minor | hdfs-client | Akira Ajisaka | Chandra Sanivarapu | 
| HADOOP-16042 | Update the link to HadoopJavaVersion | Minor | documentation | Akira Ajisaka | Chandra Sanivarapu | 
| HDFS-14934 | [SBN Read] Standby NN throws many InterruptedExceptions when dfs.ha.tail-edits.period is 0 | Major | . | Takanobu Asanuma | Ayush Saxena | 
| YARN-10053 | Placement rules do not use correct group service init | Major | yarn | Wilfred Spiegelenburg | Wilfred Spiegelenburg | 
| HDFS-15068 | DataNode could meet deadlock if invoke refreshVolumes when register | Major | datanode | Xiaoqiao He | Aiphago | 
| MAPREDUCE-7255 | Fix typo in MapReduce documentaion example | Trivial | documentation | Sergey Pogorelov | Sergey Pogorelov | 
| HDFS-15072 | HDFS MiniCluster fails to start when run in directory path with a % | Minor | . | Geoffrey Jacoby | Masatake Iwasaki | 
| HDFS-15077 | Fix intermittent failure of TestDFSClientRetries#testLeaseRenewSocketTimeout | Minor | test | Masatake Iwasaki | Masatake Iwasaki | 
| HDFS-15080 | Fix the issue in reading persistent memory cached data with an offset | Major | caching, datanode | Feilong He | Feilong He | 
| YARN-7387 | org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.TestIncreaseAllocationExpirer fails intermittently | Major | . | Miklos Szegedi | Jim Brennan | 
| YARN-8672 | TestContainerManager#testLocalingResourceWhileContainerRunning occasionally times out | Major | nodemanager | Jason Darrell Lowe | Chandni Singh | 
| HDFS-14957 | INodeReference Space Consumed was not same in QuotaUsage and ContentSummary | Major | namenode | Hemanth Boyina | Hemanth Boyina | 
| MAPREDUCE-7252 | Handling 0 progress in SimpleExponential task runtime estimator | Minor | . | Ahmed Hussein | Ahmed Hussein | 
| HADOOP-16749 | Configuration parsing of CDATA values are blank | Major | conf | Jonathan Turner Eagles | Daryn Sharp | 
| HDFS-15095 | Fix accidental comment in flaky test TestDecommissioningStatus | Major | hdfs | Ahmed Hussein | Ahmed Hussein | 
| HDFS-15099 | [SBN Read] checkOperation(WRITE) should throw ObserverRetryOnActiveException on ObserverNode | Major | namenode | Konstantin Shvachko | Chen Liang | 
| HDFS-14578 | AvailableSpaceBlockPlacementPolicy always prefers local node | Major | block placement | Wei-Chiu Chuang | Ayush Saxena | 
| HADOOP-16683 | Disable retry of FailoverOnNetworkExceptionRetry in case of wrapped AccessControlException | Major | common | Adam Antal | Adam Antal | 
| MAPREDUCE-7256 | Fix javadoc error in SimpleExponentialSmoothing | Minor | documentation | Masatake Iwasaki | Masatake Iwasaki | 
| YARN-8373 | RM  Received RMFatalEvent of type CRITICAL_THREAD_CRASH | Major | fairscheduler, resourcemanager | Girish Bhat | Wilfred Spiegelenburg | 
| MAPREDUCE-7247 | Modify HistoryServerRest.html content,change The job attempt id‘s datatype from string to int | Major | documentation | zhaoshengjie |  | 
| YARN-8148 | Update decimal values for queue capacities shown on queue status CLI | Major | client | Prabhu Joseph | Prabhu Joseph | 
| HADOOP-16808 | Use forkCount and reuseForks parameters instead of forkMode in the config of maven surefire plugin | Minor | build | Akira Ajisaka | Xieming Li | 
| HADOOP-16793 | Remove WARN log when ipc connection interrupted in Client#handleSaslConnectionFailure() | Minor | . | Lisheng Sun | Lisheng Sun | 
| YARN-9790 | Failed to set default-application-lifetime if maximum-application-lifetime is less than or equal to zero | Major | . | kyungwan nam | kyungwan nam | 
| HDFS-14993 | checkDiskError doesn’t work during datanode startup | Major | datanode | Yang Yun | Yang Yun | 
| HDFS-13179 | TestLazyPersistReplicaRecovery#testDnRestartWithSavedReplicas fails intermittently | Critical | fs | Gabor Bota | Ahmed Hussein | 
| MAPREDUCE-7259 | testSpeculateSuccessfulWithUpdateEvents fails Intermittently | Minor | . | Ahmed Hussein | Ahmed Hussein | 
| MAPREDUCE-7079 | JobHistory#ServiceStop implementation is incorrect | Major | . | Jason Darrell Lowe | Ahmed Hussein | 
| HDFS-15118 | [SBN Read] Slow clients when Observer reads are enabled but there are no Observers on the cluster. | Major | hdfs-client | Konstantin Shvachko | Chen Liang | 
| HDFS-7175 | Client-side SocketTimeoutException during Fsck | Major | namenode | Carl Steinbach | Stephen O’Donnell | 
| HDFS-15148 | dfs.namenode.send.qop.enabled should not apply to primary NN port | Major | . | Chen Liang | Chen Liang | 
| HDFS-15115 | Namenode crash caused by NPE in BlockPlacementPolicyDefault when dynamically change logger to debug | Major | . | wangzhixiang | wangzhixiang | 
| HDFS-15157 | Fix compilation failure for branch-3.1 | Major | . | Ayush Saxena | Ayush Saxena | 
| HDFS-15158 | The number of failed volumes mismatch  with volumeFailures of Datanode metrics | Minor | datanode | Yang Yun | Yang Yun | 
| HADOOP-16849 | start-build-env.sh behaves incorrectly when username is numeric only | Minor | build | Jihyun Cho | Jihyun Cho | 
| HDFS-15161 | When evictableMmapped or evictable size is zero, do not throw NoSuchElementException in ShortCircuitCache#close() | Major | . | Lisheng Sun | Lisheng Sun | 
| HDFS-15164 | Fix TestDelegationTokensWithHA | Major | . | Ayush Saxena | Ayush Saxena | 
| HADOOP-16868 | ipc.Server readAndProcess threw NullPointerException | Major | rpc-server | Tsz-wo Sze | Tsz-wo Sze | 
| HADOOP-16869 | Upgrade findbugs-maven-plugin to 3.0.5 to fix mvn findbugs:findbugs failure | Major | build | Akira Ajisaka | Akira Ajisaka | 
| HDFS-15052 | WebHDFS getTrashRoot leads to OOM due to FileSystem object creation | Major | webhdfs | Wei-Chiu Chuang | Masatake Iwasaki | 
| HDFS-15185 | StartupProgress reports edits segments until the entire startup completes | Major | namenode | Konstantin Shvachko | Konstantin Shvachko | 
| HDFS-15166 | Remove redundant field fStream in ByteStringLog | Major | . | Konstantin Shvachko | Xieming Li | 
| HADOOP-16841 | The description of hadoop.http.authentication.signature.secret.file contains outdated information | Minor | documentation | Akira Ajisaka | Xieming Li | 
| YARN-10156 | Fix typo ‘complaint’ which means quite different in Federation.md | Minor | documentation, federation | Sungpeo Kook | Sungpeo Kook | 
| HDFS-15147 | LazyPersistTestCase wait logic is error-prone | Minor | . | Ahmed Hussein | Ahmed Hussein | 
| HDFS-14668 | Support Fuse with Users from multiple Security Realms | Critical | fuse-dfs | Sailesh Patel | Istvan Fajth | 
| HDFS-15111 | stopStandbyServices() should log which service state it is transitioning from. | Major | hdfs, logging | Konstantin Shvachko | Xieming Li | 
| HDFS-15199 | NPE in BlockSender | Major | . | Ayush Saxena | Ayush Saxena | 
| HADOOP-16891 | Upgrade jackson-databind to 2.9.10.3 | Blocker | . | Siyao Meng | Siyao Meng | 
| HADOOP-16840 | AliyunOSS: getFileStatus throws FileNotFoundException in versioning bucket | Major | fs/oss | wujinhu | wujinhu | 
| YARN-9427 | TestContainerSchedulerQueuing.testKillOnlyRequiredOpportunisticContainers fails sporadically | Major | scheduler, test | Prabhu Joseph | Ahmed Hussein | 
| HDFS-15216 | Wrong Use Case of -showprogress in fsck | Major | . | Ravuri Sushma sree | Ravuri Sushma sree | 
| HDFS-15211 | EC: File write hangs during close in case of Exception during updatePipeline | Critical | . | Ayush Saxena | Ayush Saxena | 
| HDFS-15208 | Suppress bogus AbstractWadlGeneratorGrammarGenerator in KMS stderr in hdfs | Trivial | . | Wei-Chiu Chuang | Wei-Chiu Chuang | 
| HDFS-15219 | DFS Client will stuck when ResponseProcessor.run throw Error | Major | hdfs-client | zhengchenyu | zhengchenyu | 
| HADOOP-16949 | pylint fails in the build environment | Critical | build | Akira Ajisaka | Akira Ajisaka | 
| HADOOP-14836 | Upgrade maven-clean-plugin to 3.1.0 | Major | build | Allen Wittenauer | Akira Ajisaka | 
| MAPREDUCE-7272 | TaskAttemptListenerImpl excessive log messages | Major | . | Ahmed Hussein | Ahmed Hussein | 
| HDFS-15283 | Cache pool MAXTTL is not persisted and restored on cluster restart | Major | namenode | Stephen O’Donnell | Stephen O’Donnell | 
| HADOOP-16944 | Use Yetus 0.12.0 in GitHub PR | Major | build | Akira Ajisaka | Akira Ajisaka | 
| HDFS-15276 | Concat on INodeRefernce fails with illegal state exception | Critical | . | Hemanth Boyina | Hemanth Boyina | 
| HDFS-15281 | ZKFC ignores dfs.namenode.rpc-bind-host and uses dfs.namenode.rpc-address to bind to host address | Major | ha, namenode | Dhiraj Hegde | Dhiraj Hegde | 
| HDFS-15297 | TestNNHandlesBlockReportPerStorage::blockReport_02 fails intermittently in trunk | Major | datanode, test | Mingliang Liu | Ayush Saxena | 
| HADOOP-17014 | Upgrade jackson-databind to 2.9.10.4 | Blocker | . | Siyao Meng | Siyao Meng | 
| HDFS-15286 | Concat on a same files deleting the file | Critical | . | Hemanth Boyina | Hemanth Boyina | 
| HADOOP-15565 | ViewFileSystem.close doesn’t close child filesystems and causes FileSystem objects leak. | Major | . | Jinglun | Jinglun | 
| HADOOP-17052 | NetUtils.connect() throws unchecked exception (UnresolvedAddressException) causing clients to abort | Major | net | Dhiraj Hegde | Dhiraj Hegde | 
| YARN-10347 | Fix double locking in CapacityScheduler#reinitialize in branch-3.1 | Critical | capacity scheduler | Masatake Iwasaki | Masatake Iwasaki |